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Help with the check engine light

581 views 1 reply 2 participants last post by  macdrone 
#1 ·
I have a 1991 W124 M103.

The issue: 11 flashes, which I've translated to "air injection system".

I've changed the O2 sensor and had recently replaced the smog pump, so feel those can be eliminated as possibilities.

My next test will be the EGR tube, any other ideas what to look at? or for?
 
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